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Latest E-textile technologies needs wireless medium and channel as well as appreciable coverage area with small size and robust structure. The sensors embedded inside textile material must be insensitive to noise and comfortable to wear. This review paper summarizes and addressing the Ultra High Frequency Radio Frequency Identification (UHF RFID) tags equipped all the body worn textile sensors. UHF RFID tags are the type of sensors which allow usage of wireless communication up to a certain distance. This is an attempt to provide new insights in wearable devices with aid of Electronics augmented with Textile Technology for better comfort and reliability.
Present generation is very much interested in body worn communication system and textile antennas. These antennas can be easily fitted in cloths. Cloths are integrated with RFID sensors. These RFID sensors are Radio Frequency Identification Sensors which helps in detection of motion from several feet away and does not require direct contact of device. They work on electromagnetic fields. When these RFID sensors are attached to textile material if gives generation to wireless wearable textile sensors. These wearable sensors have wide range of use in real world. Some of these uses will be discussed below . A. Textile Antenna Sensors for on-body: The need for developing body worn sensor is to be capable of recording the activities, body conditions, physiological parameters and user location form collected data. These body worn sensor finds its application in the field of military, rescue, medical or entertainment world. Depending upon the application the frequency range is decided. Major parameters and points should be kept in mind while designing developing and deploying of textile Antennas: 1. Radiating Antenna sensor must be safe for human being and human body. 2. Sensors geometry and dimensions must be taking care of wearable comfort and properties. 3. Antennas efficiency should not be compromised. Thus to integrate antenna sensor in textile microchips are proposed. Fig depicts the design and geometry of the same .
Conclusion Passive RFID tags consist of antenna based sensing with minimal increase in complex and power consumption. Textile antenna with stretchable section using RFID strain sensor tag modifies the antenna properties. The electrical interconnection of two fabric are done using conductive yarn stitching
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